Automobile heater



Sept. 18, 1928. 1,684,967

N. A. OLUND AUTOMOBILE HEATER Filed June 19, 1926 Patented Sept. 18, 1928.

UNITED STATES PATENT OFFICE,

lNELS A. OLUND, 0F CAMBRIDGE, MINNESOTA.

AUTOMOBiLE HEATER.

Application filed June 19, 1926. Serial No. 117,164.

Thisinvention relates to automobile heaters and especially to such devices adapted to be applied to the exhaust pipe of an inter nal combustion engine. a

It is the main object of this invention to provide a highly efficient automobile heater I therethrough a relatively slow circulation of air over the hot portion of the exhaust pipe, delivering said heated air into the interior of the automobile body. v

A more specific object of the invention is to provide an automobile heater having a heater casing adapted to be disposed about a curved portion of an exhaust pipe with its forward end disposed at a higher level than 1 its rear end, and an intake passage disposed about theheater casing and communicating therewith at the rear end thereof, whereby quantities of air will be forced rearwardly along the outer sides of said heater casing receiving heat through the radiation thereof, and will be caused to pass through said heater casing in a forwardly direction and into the interior of the automobile adjacent the drivers seat. The heater as disclosed is especially applicable to cars having an exhaust pipe curved beneath the inclined foot boards where a relatively short straight section of the exhaust pipe'is employed. Such cars include the Dodge, Oldsmobile, WVillys Kni ht, Buick, Nash and many other standard automobiles. i

The above and other objects will be ap- 7 parent from the following description made in connection with the accompanying drawings, wherein like characters refer to similar parts throughout the several views, and in which;

Fig. 1 is a fragmentary longitudinal section through the body of an automobile, showing a preferred'eijnbodiment of the in ventien attached to the exhaustpipe thereof;

Fig. 2 is a vertical section taken onthe line 2-2 of Fig. 1 showingthe'intake passage disposed about the heater casing; i

Fig. 3 is a vertical section taken on the line 33 of Fig. 1 showing the communica tion of said intake passage with said heater casing, and;

Fig. 4 is a section taken on the line 4 4;of I

Fig. 1 showing the delivery passage connected to the forward portion of the heater casmg. V

In the drawings, a portion of an automobile body is illustrated having the floor or foot boards 5, a front seat 6, the downwardly curvedexhaust pipe 7, and the muffler 8.

In general my invention comprises a main or heater casing designated as an entirety by the letter A, having an upwardly inclined forward end, an intake casing B disposed about the heater casing and communicating with the rear thereof and a discharge passage C communicating with the interior of i the automobile through the floor portion 5.

Heater casing A preferably is formedvin two sections, each comprising a pair of flanged substantially semi-cylindrical shells. The rear sectionv adapted to surround the straight portion of the exhaust pipe 7 is made up of shell members 9 having the relatively narrow upper flanges 9 and the relatively wide lower flanges 9 The forward 7 end of this section is connected with the inclined section of the heater casing comprismg semi-cylindrical shell members 10 having equal relatively narrow flanges 1O at the top and bottom. I p The 1ntake passage or casing B is of somewhat larger diamcter than heater casing A.

and is superimposed about the latter and comprises the shell membersll eccentrically alined with shell members 9 and carrying the equal flanges 11 at the tops and bottoms thereof. Flanges 11 are clamped together about the flanges S and 9' respectively of the heater casin preferably by means of a plurality of nutted bolts 12. It will be seen that the relatively wide flanges 9 of shell members 9 permit said casing to be eccentrically alined and secured in the manner de scribed. f

The forward stud of casing is left open and cut to partially embrace the lower portion of the forward section of the heater casing leaving a funnel portion 13 adapted to receive a current of air when the car is in motion. The rear end of intake casing B is closed by means of collar members 14 and clamped about the exhaust ipe 7 adjacent the muffler 8. The rear en of heater casing A terminates ehortof the rear end of intake casing B and is left open to communicate therewith, while the seaward end of heater casing A is provided with a discharge casing 15 secured to one side there'- of through the flanges. The inner shell member lO iscut 'off rearwardly of the forward end of the heater to accommodate dis charge casing '15, which with the forward end of *theheater is secured in proper spaced relation about the curved portion of the exhaust pipe clamped by means of suitable collars 16 also closing the forward end of the heater easin V y f'he up er end of the discharge casing 15 is adapte to project throu h one of the floor boards 5 and have mounted thereover a valve or register 1? of any suitable type. I

v The operation of the above described device may be briefly summarized as follows: Quantities of air will be forced through the intake casing B by the forward movement of the vehicle and also to some eXtent by the current set up through the engine fan (not shown). This air entering funnel portion 13 offintake casing B will pass along the sides ofthe rear section of heater casing A, beinghea'ted to some extent in its passage b the radiation from said heater cas ing. he partially heated air will be admitted to the rear end of the heater casing, where in seeking its higher level it will pass slowly forwardly over the hottest portion of the exhaust pipe and into the discharge C215- vention.

ing C. The supply of heated air to the interior of the automobile may, of course, be controlled by the register 17. It will, therefore, be seen that the air before enterin the heater casing will be partially warmed and will be heated to a high temperature in its slow movement through the heater casing. v A

The construction of theinclincd forward end of the heater easing A enables the device to be readily attached to the curved portion of an automobile exhaustpipe, the

angle between the two sections of the heater casing substantially conforming to the curve of the exhaust pipe. The actualu'sage of my device has shown the same to highly efiicientfor the purposesenumerated.

It will, of course, be understood that vari ous changes'may be made in the form, de-

tails, proportions and arrangement of parts without departing from the scope of the in- What is claimed is:

1. An automobile heater comprising a heater casingadapted to enclose a portion a of the exhaust pipe of an automobile, an air intakepassage surrounding a portion of said heater casing and spaced therefrom and communicating with said heater. casing adj acent the rear end thereof, said intake passage being open at its forward end, whereby a current air will be set up passing rearwardly over said heater casing longitudimany "thereof and passing through said heater casing in a forward direction, and

discharge means connected with said heater casln i V V a "2. in automobile heater com rising an inn r casing adapted toenciosea portion 0 the exhaust pipe of an automobile; and. me ing anintake passageadjacent the rear, end and a dischargepa'ssage adjacent the forward end, an outer easing surrounding the rear portion of said inner casing and spaced therefrom, said inner *casin' terminating short of the rear end of sai outer easing, I and said outercasing having "an opening exhaust pipe, therearend of said heater casing terminating short'of therear end of said intake casin to eommunicatewith the same,

and means a jacentthe forward end of said heater casing for delivering heated airto Q the interior of the automobile. H

4 An automobi e heater comprising a heater casing adapted to enclose a portion of an exhaust pipe, having a substantiall straight portionand an upwardly extende portion adapted to substantially enclose the curved portion ofsaid exhaust pipe, asub stantiallv straight intake casing su erimposed about and spaced from said.- eater casin and communicating V with the rear end t ereof, the forward end of said intake a casing being open and dispomd below the h inclined end of said heater casing, and means for delivering heated air from the forward i portion of said heater casi of the" automobile. V a 1 V p i 5, An automobile heater comprising a heater casing adapted to enclose a portion of the exhaust pipe ofan automobile, an air intake casing surrounding said'heater easing agd communicatingvwith said heater ease ing a iacent the rear end. thereof, said intake casing being open adjacent its forward end,

lg to the interior said heater casing having a discharge pasthan the flanges of said intake casing and sage that communicates with the interior of being clamped between said last mentioned an automobile body, saidheater casing and flanges to hold said casings in spaced rela- 10 said intake casing both being formed of cotion.

5 operating shell sections said shell sections In testimony whereof I aflix my signature. having registering longitudinal flangesand V the flanges of said heater casing being wider NELS A. OLUND. 

